Where does independent research go on the UC Application?

Hi,
The summer after my junior year I worked as an unpaid research assistant at a UC biosciences lab. Would I put this experience under Extracurricular Activity (“These could include hobbies, clubs, sports or anything else you haven’t had the chance to tell us about”) or Volunteering / Community service (“These are activities you’ve donated time and effort to without getting paid”)?

Thanks!

Drop down in the Activities section

If you click on the i icon next to the category, it describes what they consider Educational Prep Programs. In the description, you’ll find research listed.